<http://webisa.webdatacommons.org/prov/68185385>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/297207810> .
<http://webisa.webdatacommons.org/297207810>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/297207810>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/297207810>	<http://www.w3.org/ns/prov#value>	"Thus, the reduction of black copper oxide whiskers by strong reducing agents such as formaldehyde, produces a mass of copper particles or powder rather than a microstructure of discrete copper whiskers." .